/**
 * Copyright 1996 self.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 * 	The greatest achievement is selflessness. The greatest worth is self-mastery.
 * 	The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 * 	The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 * 	The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 * 	The greatest goodness is a peaceful mind. The greatest patience is humility.
 * 	The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 * 	The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 *
 * @author Ashin Wimalajeewa
 *
 * Note, this is a very old runtime library that I have evolved since 1996. I rarely use it
 * now because the Apache Commons project has made it obsolete.
 */
package self.swing;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import self.awt.*;

public class PlottingPane extends JPanel {
	
	/**
	 * If the internal state of this class ever changes in such a way that it can't be defaulted,
	 * then the {@link #serialVersionUID} should be incremented to ensure serialized instances cleanly fail.  
	 */
	private static final long serialVersionUID = 1;
	
  private InternalCanvas  canvas = new InternalCanvas();
  private JScrollPane     scroller = new JScrollPane( canvas );
  
  private IPlotter        renderer;
  
  public PlottingPane() {
    canvas.setPreferredSize(new Dimension(1500, 1500));

    scroller.setBorder(null);
    scroller.getHorizontalScrollBar().setUnitIncrement(25);
    scroller.getVerticalScrollBar().setUnitIncrement(25);

    setLayout( new BorderLayout() );
    add(scroller, BorderLayout.CENTER);
  }

  public void setPlotter( IPlotter agent ) {
    renderer = agent;
  }
  
  public IPlotter getPlotter() {
    return renderer;
  }
  
  public void addMouseListener( MouseListener listener ) {
    canvas.addMouseListener( listener );
  }

  public void addMouseMotionListener( MouseMotionListener listener ) {
    canvas.addMouseMotionListener( listener );
  }

  public void addKeyListener( KeyListener listener ) {
    canvas.addKeyListener( listener );
  }

  public void removeMouseListener( MouseListener listener ) {
    canvas.removeMouseListener( listener );
  }

  public void removeMouseMotionListener( MouseMotionListener listener ) {
    canvas.removeMouseMotionListener( listener );
  }

  public void removeKeyListener( KeyListener listener ) {
    canvas.removeKeyListener( listener );
  }
  
  class InternalCanvas extends JPanel {
  	
	/**
	 * If the internal state of this class ever changes in such a way that it can't be defaulted,
	 * then the {@link #serialVersionUID} should be incremented to ensure serialized instances cleanly fail.  
	 */
	private static final long serialVersionUID = 1;
	
    private class MouseFocusCommander extends MouseAdapter {
      public void mouseClicked(MouseEvent e) {
        InternalCanvas.this.grabFocus();
      }
    }
    
    private MouseFocusCommander focusListener = new MouseFocusCommander();
    
    public InternalCanvas() {
      this.addMouseListener( focusListener );
      setLayout(null);
      setDoubleBuffered(false);
    }

    public boolean isFocusTraversable() {
      return true;
    }
    
    public void paintComponent( Graphics g ) { 
      if ( renderer != null )
        renderer.plot( g );
    }
  }  
}

